2007-05-17 18:14:38 · 12 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Depends on how you measure it:
Sidereal month: 27.321 582 d (27 d 7 h 43.1 min)
(relative to fixed stars)
Synodic month: 29.530 588 d (29 d 12 h 44.0 min)
(from new moon to new moon)
Tropical month: 27.321 582 d
(relative to precessed equinox - is actually very slightly shorter than sidereal month)
These last two are less commonly used:
Anomalistic month: 27.554 550 d
(from perigee to perigee)
Draconic month: 27.212 221 d
(from node to same node)
2007-05-17 18:52:18 · answer #1 · answered by injanier 7 · 0⤊ 1⤋
The same length of time that it takes for the earth to orbit the moon - it is a coupled system
2007-05-18 01:57:15 · answer #2 · answered by amused_from_afar 4 · 0⤊ 1⤋
The moon's revolution (around the earth) and rotation (turning on its axis) are pretty much exactly same (27 days 7 hours 43 minutes or 27.322 days) - thus we always see the same side of the moon. The other side is in shadow during the time it is facing us.
2007-05-18 01:31:36 · answer #3 · answered by PrincessArwen 2 · 0⤊ 1⤋
28 and 1/4 days.
2007-05-21 15:50:26 · answer #4 · answered by johnandeileen2000 7 · 0⤊ 0⤋
Actually that's 29 days, 12 hours, 44 minutes and 3 seconds
2007-05-18 01:18:12 · answer #5 · answered by ::Ð嬢Y¢LøÞs:: 3 · 0⤊ 1⤋
28 days
2007-05-18 01:24:36 · answer #6 · answered by Dr. Eddie 6 · 0⤊ 1⤋
28 days
2007-05-18 01:17:24 · answer #7 · answered by Need Help 1 · 0⤊ 1⤋
a day? im confused now.
yeah it takes a day to orbit the earth and does a complete revolution every 28 days.. still confused
2007-05-18 01:18:07 · answer #8 · answered by dm234127 2 · 0⤊ 2⤋
it needs 27 days 7 hours and 43 minutes
2007-05-19 05:11:48 · answer #9 · answered by ~~simply me~~ 4 · 0⤊ 1⤋
29 days. I think
2007-05-18 01:17:36 · answer #10 · answered by Captain 3 · 0⤊ 0⤋